Most likely, the Upper Bus Kit will be rated for 400 Amps Continuous (400 Amps drawn for >180 Minutes), as the Service Disconnect is rated 400 Amps.The (2) 200 Amp 2 Pole Devices may draw 200 Amps each, and continue to draw 200 Amps steadily until the Sun Supernovas; yet will not trip.

The highest Rating which the Lower Bus Kit would be rated for is 225 Amps Continuous (225 Amps for >180 Minutes).The Lower Bus Kit should be Nominally rated as 200 Amps Continuous (200 Amps for >180 Minutes).

The Bus Tabs (Plug-In stabs for the Over Current Protection Devices), will typically be rated 100 Amps Max., 70 Amps Continuous.